Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS33667

Announcement observedARIN

CMCS - Comcast Cable Communications, LLC · CMCS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/13/2026, 13:35:21Snapshot expired

View network topology RDAP registration

ASN: AS33667
Registration country: United States
Name: CMCS - Comcast Cable Communications, LLC
Abbreviation: CMCS
Registration date: 2/16/2005, 19:59:31
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
100.42.16.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/2/2026, 16:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
103.111.63.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
103.216.197.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
104.247.212.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
107.0.64.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
107.158.164.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
107.158.165.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
107.158.6.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
107.158.7.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
135.132.64.0/19BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
135.132.72.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/2/2026, 08:00:00	✓	×	Historical record
135.132.76.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/2/2026, 08:00:00	✓	×	Historical record
138.226.112.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
138.226.192.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/9/2026, 16:00:00	✓	×	Currently valid
138.226.196.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/2/2026, 08:00:00	✓	×	Historical record
138.226.48.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
138.226.64.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
139.181.26.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
140.89.64.0/18BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
157.240.151.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
157.240.152.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
16.5.8.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
161.82.0.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	9/23/2026, 16:00:00	✓	×	Historical record
161.82.12.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	9/23/2026, 16:00:00	✓	×	Historical record
161.82.44.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	9/23/2026, 16:00:00	✓	×	Historical record
162.218.64.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/2/2026, 16:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
162.218.89.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
169.128.228.0/22BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/5/2026, 16:00:00	10/13/2026, 00:00:00	✓	×	Currently valid
169.230.76.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
169.230.77.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
185.201.41.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
185.201.43.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
185.22.43.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
192.189.161.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
192.206.19.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
192.70.238.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
198.145.106.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/9/2026, 16:00:00	✓	×	Currently valid
198.202.219.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
204.145.245.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
209.222.242.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/2/2026, 16:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
209.78.88.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/2/2026, 08:00:00	✓	×	Historical record
216.170.120.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/9/2026, 16:00:00	✓	×	Currently valid
23.230.200.0/21BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	10/2/2026, 16:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
36.255.215.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
40.27.174.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
45.67.141.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
5.182.186.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
5.182.193.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
5.182.194.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid
5.182.195.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/13/2026, 08:00:00	✓	×	Currently valid

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: CMCS - Comcast Cable Communications, LLC
RIR: ARIN
Registration country: United States
Registration date: 2/16/2005, 19:59:31
Abuse contact: abuse@comcast.net

Snapshot trend

10/13/2026, 13:35:2166 v458 v62 Upstream · 0 Uncertain

10/12/2026, 05:02:3266 v458 v63 Upstream · 0 Uncertain

10/10/2026, 19:24:0766 v458 v62 Upstream · 0 Uncertain

10/5/2026, 21:31:2865 v458 v62 Upstream · 0 Uncertain

10/2/2026, 16:03:0164 v459 v62 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · rir-rdap-asn · iana-rdap-asn-bootstrap